问题如下图：
选项：
A. 
B. 
C. 
解释：
c为什么是错的？按照这个解释，median是小于mean的呀？
The mo is larger ththe mefor StoThe meis less ththe mefor Sto A is the answer StoA with negative skewness ha long tail on its left si, the meis less ththe mean, whiis less ththe mo, so choiB is correct. For the positively skewethe mo is less ththe mean, whiis less ththe mean, so choiC is correct. Thus, choiA is least accurate. 感觉左偏右偏都知道，只是均值中数中位数老是对不上
老师，negative skewness=left skwenss,positive skewness=right skewness是这样吗
